startstats
Use the startstats command to modify the interval at which per-node statistics for volumes, managed disks (MDisks), and nodes are collected.
Parameters
- -interval time_in_minutes
- (Required) Specifies the time in minutes. This is the time interval between the gathering of statistics, from 1 to 60 minutes in increments of 1 minute.
Description
Running the startstats command will reset the statistics timer to zero (0), and give it a new interval at which to sample. Statistics are collected at the end of each sampling period as specified by the -interval parameter. These statistics are written to a file, with a new file created at the end of each sampling period. Separate files are created for MDisks, volumes and node statistics.
The files generated are written to the /dumps/iostats directory.
Nm_stats_nodepanelname_date_time
Nv_stats_nodepanelname_date_time
Nn_stats_nodepanelname_date_time
Statistics files are created for all time intervals. Before the 17th file for each type is created, the oldest file of that type is deleted.
These files can be listed by using the lsdumps command.
stats_type_stats_nodepanelname_date_time
Where stats_type is Nm for MDisks, Nv for volumes, and Nn for node statistics. nodepanelname is the current configuration node panel name, date is in the format of yymmdd, and time is in the format of hhmmss.
The following is an example of an MDisk statistics file name: Nm_stats_000229_031123_072426
The following is an example of a volume statistics file name: Nv_stats_000229_031123_072426
The following is an example of a node statistics file name: Nn_stats_000229_031123_072426
- The number of SCSI read and write commands that are processed during the sample period
- The number of blocks of data that are read and written during the sample period
- Per MDisk, cumulative read and write external response times in milliseconds
- Per MDisk, cumulative read and write queued response times
- The total number of processed SCSI read and write commands
- The total amount of read and written data
- Cumulative read and write response time in milliseconds
- Statistical information about the read/write cache usage
- Global Mirror statistics including latency
- Usage figure for the node from which the statistic file was obtained
- The amount of data transferred to and received from each port on the node to other devices on the SAN
- Statistical information about communication to other nodes on the fabric
An invocation example
startstats -interval 25
The resulting output:
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